People who cannot walk short distances without pain may be suffering from peripheral arterial disease, shortened “PAD”, a potentially limb-threatening condition that puts them at greater risk for heart attack and stroke. About 1 in every 20 Americans over the age of 50 has peripheral arterial disease. This problem will only worsen as we get more people living into their 80s and 90s in America. The number of patients in the United States with PAD is growing rapidly, and it's g